Do vetai ling-machine



(No Model.) 4 Sheets-Sheet 1.

J. G. OETZ'EL. DOVETAILING MACHINE.

Patented Feb. 9. 1886.

m k L m OgWENTOR 0 d 7?? BY 66mm ATTORNEYS Wl'l'NESSES:

N, PETERS, Phow-Lnhagmpher, Washington, 0. c.

(N0 Model.) 4 Sheets-Sheet 2 J. G. OETZEL.

DOVETAILING MAGHINE.

DWENTOR 4 ATTORNEYS.

(No Model.) 4 Sheets-Sheet 3.

J. G. 'OETZEL.

DOVETAILING MACHINE. No. 335.333. Pate d Feb. 9. 1886.

ATTORNEYS.

(NoModeL) 4"Sheets-Sheet 4.

J. G. QETZEL.

DOVETAILING MAGHINE.

Patented Feb. 9, 1886'.

WITNESSES: INVENTOR:

ATTORNEYS.

N. PETERS. mmwuma m. Washingion, u. c.

JOHN GEORGE OETZEL, OF BROOKLYN, NEW YORK.

DOVETAILINGWMACHINE.

SPECIFICATION forming part of Letters Patent No. 335,833, dated February9, 1886.

Application filed November 7, 1885. Serial No. 182,113.

' chines, of which the following is a full, clear,

and exact description.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is aplan view of my improved machine, part being broken away.Fig. 2 is a sectional side elevation of the same, taken through thebroken line a: as, Fig. 1. Figs. 3, i, and 5 are views illustrating adovetailed joint formed by my machine. Fig. 6 is asectional endelevation of the machine, part being broken away. Fig. 7 is a sideelevation of the dovetail cutter. Fig. 8 represents the same turnedone-quarter around. Fig. 9 is an end elevation of the same. Fig. 10 is aplan view of a part of the machine shown as arranged for squaringfurniturelegs, part being broken away. Fig. 11 is a sectional elevationof a part of the same.

The object of this invention is to provide wood-working machinesdesigned especially for use in making furniture, but which can be usedwith advantage in other wood-working.

The invention consists in the construction and combination of variousparts of the machine, as will be hereinafter fully described.

A represents the frame of the machine. To the top of the frame A areattached bearings B, in which revolves a shaft, 0. To the middle part ofthe shaft 0 is attached apulley,D, to receive a drivingbelt, E, from anyconvenient power. In the end of the shaft 0 is formed a screw-hole toreceive the screwthreaded shank of the cutter F for forming dovetails.The cutterF is made with cutting lips F at its end, and with inclinedcutting side edges, F as shown in Figs. 7, 8, and 9. The cutter Fprojects through an aperture in the vertical guide-plate G, as shown inFigs. 1, 2, and 6.

The vertical guide-plate G- is formed upon or rigidly attached tobrackets H, the lower edges of which are dovetailed and fit intodovetailed grooves I in the top of the frame (No model.)

A, where they are secured in place by handscrews J so that the saidguide-plate G, by loosening the said hand-screws J, can be adjusted outor in to allow the cutter F to out a shallower or a deeper dovetail, asmay be desired, and so that the said guide-plate G will be held rigidlyin place when adjusted.

K is the feed-table, which is attached to a frame, L, resting andsliding upon the bracketarms M, formed upon the end parts of thebracket-plate N, so that the said arms will be rigidly connected andwill always move together. the frame L are formed \l-shaped grooves toreceive the \l-shaped upper edges of the bracketarms M to prevent thefeed-table from having a lateral movement, while allowing it to be movedout and in easily.

Upon the outer edges of the side bars of the frame L are formed flangesO,projectiug downward and then inward, and provided with setscrews P, torest against flanges Q, formed upon the outer sides of the bracket-armsM, and thus lock the feed-table, when adjusted, from movement upon thesaid arms.

, The ends of the bracket-plate N are rabbeted, and engage with rabbetedcleats R, secured to the frame A by screws S, and slotted transverselyto receive the said screws S, so that the said cleats can be adjusted totake up the wear. The cleats R are secured, when in use, against outwardmovement by set-screws T, passing through screw-holes in flanges U,formed upon or secured to the frame A, so that the forward ends of thesaid screws T will rest against the outer edges of the said cleats It,as shown in Figs. 1 and 6. The bracketplate N is provided withset-screws N to rest against the frame A and lock the said bracketplateN in place when desired. Upon the inner side of the middle part of thebracket plate N is formed, or to-it is attached, a lug, V, to which issecured the end of a chain or cord, W. The chain or cord passes over aguide-pulley, X, pivoted to a hanger, Y, secured to the top of the frameA. The other end of the chain or cord WV is attached to a treadle, Z,hinged to a support secured to the floor or to the frame A, so that thefeed-table can be raised by operating the said treadle Z. To the innerside of an end part of the bracket-plate N is hinged the lower end of aratchet- In the lower sides of the side bars of 6 5 bar, a, the teeth ofwhich engage with a catchplate, -b, attached to the top of the frame A,

to support the feed-table in any position into which'it may be adjusted,and to insure the said feed-tables being adjusted through equalintervals.

bar a is held against the catch-plate b by a spring, 0, attached to thetop of the frame A,

l and resting against the rear edge of the said ratchet-bar a, as shownin Figs. 1 and 6.

In using the machine to form dovetail recesses a piece, d, of timber tobe recessed is placed with its edge upon the feed-table K, and its sideresting against the g-uide'plate G, and is moved forward until thecutter F has cut a recess, 6, to the desired depth. The timber d is thendrawn back, the feed-table K is loweredthrough a space equal to thedesired distance apart of the dovetail recesses e, and the said timberis again moved forward against the cutter F, and so on until the desirednumber of recesses e have been formed. The depth of the recesses e ismade uniform by a gage-bar, f, pivoted at its outer end to the table K,and resting against a pin, g,in-

serted in a hole in the said table K. Two pins,

9, are used, one upon each side of the gagebar f, so that the timber tobe recessedcan be placed at either side of the cutter F, as may 30. bedesired. 7 e

In using the machine to form dovetail tongues, a number of the pieces hof timber to be operated upon are clamped together side by side, areplaced edgewise upon the feedtable K, with their ends resting againstthe guide-plate G, and are moved laterally against the cutter F, whichcuts a dovetailed groove across the ends of the pieces h, and thus formsone-side of a dovetailed tongue. The table K is then lowered and anothergroove is cut,

forming the other side of a dovetailed tongue,

i, and so on until the desired number of tonguesi have been formed. Tothe other end of the shaft 0 is attached or upon it is formed anextension, 0, to serve as a mandrel to receive a saw, j, as shown inFigs. 1 and 2, or a cutter head, is, as shown in Fig. 10, as the work tobe done may require.

Z is a feed-table, which is secured toa frame, m, resting uponbracket-arms n. The bracket arms a are formed upon or rigidly attachedto a connecting-plate, 0, so that the said arms will be kept in properrelative positions, and

will be made to move together. The bracketplate 0 rests against the endof the frame A, and is kept in place by cleats and screws 19 q andflanges and set-screws rs, in the same manner as the bracket-plate Nhereinbefore described.

To the inner side of the middle part of the bracket-plate 0 is attachedor upon it is formed a lug, t, which has a screw-hole formed through itto receive the hand-screw u. The handscrew it is swiveled to across-bar, o, secured to the frame A, so that the feed-table Z can beraised and lowered to allow the saw j or cutter-head k to cut to anydesired depth. By

The toothed edge of the ratchetoperating the hand-screw u the table Ican be adjusted to allow the work to be placed above or below the saw orcutter-head, as may be desired, or as the character of the work mayrender most convenient.

The table Z is slotted to receive the saw 3', and when the cutter-head kis to be used the said table should be replaced by a table, w, having alarge opening to receive'the said cutter-head k.

When the machine is to be used for cutting grooves'in lumber, a gage andguide-cleat, m, is attached to the table Z at a distance from the saw jequal to the desired distance apart of the said grooves, and of abreadth equal to the width of the said grooves, and the lumber to begrooved. is placed upon the table Z, with its edge resting against thecleat w, and is pushed forward over the saw j, which cuts the firstgroove. The lumber is then adjusted with the first groove upon the cleat00, and is' again pushed forward over the saw, and so on until thedesired number of grooves have been cut, the groove last out beingalways placed upon the cleat x.

In the table 20, or in both the tables 10 Z, is formed a groove, whichis preferably lined with metal, as shown in Figs. 1, 2,10, and 11, toprevent wear, andwithin which-is placed a sliding bar, 2. To the bar 2is secured by a hand-screw, 1, a plate, 2, in which is formed a curvedslot, 3, to receive the hand-screw 1, so that the said plate and theframe 4, to which the said plate is rigidly attached, can be readilyadjusted by loosening the said hand-screw 1. The frame 4 is formed oftwo side bars held at the proper distance apart by two end bars, andsecured in place by two bolts passing through the ends of the saidsidebars. Several grooves are formed in the inner surfaces of the innerparts of the side bars of the frame 4 to receive tenons formed upon theends of the inner end bar of the said frame, so that the said end barcan be readily adjusted at any desired distance from the outer end bar.The inner end bar of the frame 4 is faced with a metal plate, 5, in thecenter of which is formed a square hole to receive the squared neck ofthe clutch -head 6, the cylindrical stem of which passes through a roundhole in the said end bar. In the center of the outer end bar of the fram4 is formed a screw-hole to receive the crankscrew 7, the forward end ofwhich is pointed to serve as a center to receive the outer end of afurniture-leg or other work, a part of which is to be squared, and theother end of which is held by the points of the clutch-head 6, whichpoints are arranged to correspond with the clutch-points of the lathe,so that the work will be centered by inserting the points of theclutch-head 6 in the holes formed by the points of the lathe-clutch andinserting the point of the crank-screw in the hole formed by thelathe-center. The frame'4 and the attached work are then pushed over thecutter-head it, which squares off one side of the work. The

IIO

frame iis then drawn back,the crank-screw 7 is turned out to release thework, and the work and clutch-head 6 are drawn forward, turnedone-quarter around, and again pushed back into place. Ihe crank-screw 7is then turned forward, and the frame 4 and the work are again pushedover the cutter-head k and a second side of the work is squared, and soon until the four sides have been squared, the square hole in the plate5 and the square neck of the clutch-head 6 causing the four sides of thework to be exactly at right angles with each other.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent-- 1. In a wood-Working machine, thecombination, with the frame A, shaft 0, and cutter F, of the verticalguide-plate G, apertured to receive the said cutter, and provided withbrackets adj ustabl y held on the table, substantially as described,whereby provision is made for allowing the cutter to enter the work atany desired depth, as set forth.

2. In a wood-working machine, the combination, with the frame A, theshaft 0, and the cutter F, of the vertically-adjustable bracketarms M,connected by plate N, the feed-table K on said bracket-arms, the chain\V, secured to the plate N, guide-pulley X, and treadle Z, substantiallyas herein shown and described, whereby the said feed -table can bereadily raised and lowered, as set forth.

3. In a wood-working machine, the combination, with the frame A and theplate N, connecting the bracket-arms that carry the feedtable, of theratchet-bar a, pivoted to the said bracket-plate, its catch-plate b,secured to the table, and holding-spring 0, having its free end restingagainst said catch-plate, substantially as herein shown and described,whereby the said feed-table can be readily raised or lowered throughuniform spaces, and will be securely held in place when adjusted, as setforth.

4. In awood-working machiue,the combination, with the bracket-arms M,having flanges Q, and the feed-table K, of the frame L, to which thefeed-table is attached, provided with angular flanges O, for thereception of the flanges of the bracket-arms, and the setscrew P,passing through the flanges O and bearing against the flanges Q,substantially as described, whereby the table can be readily adjustedand will be firmly held in place, as set forth.

5. In a woodworking machine, the combination, with the frame A and theplate N, connecting the bracket-arms M that carry the feed-table, of theslotted cleats R, the screws S, for securing the cleats to the frame,the frame-flanges U, and the set-screws 'I, for preventing outwardmovement of the cleats, substantially as herein shown and described,whereby the said plate will be held in place and the wear can be takenup, as set forth.

6. In a wood-working machine, the combi nation, with the feed-table w,of the frame 4, having adjustable inner end bar, the facingplate 1',attached to the said end bar and havhaving tapered square neck andcylindrical ing square perforation, the clutch-head 6,

stem, and the crank-screw 7, substantially as herein shown anddescribed, whereby the work to be squared can be readily clamped andcarried to the cutterhead and turned through exactly one-quarter of arevolution, as set forth.

7. In a wood-working machine, the feedtable having a groove, y, and thesliding-bar zin said groove, in combination with the workcarrying frameabove the table, provided with the plate 2, having a curved slot, 3, andthe clamping-screw 1, secured to the sliding bar and working in the slotof the plate 2, substantially as herein shown and described, wherebyprovision is made for moving the said frame squarely up to thecutter-head, as specified.

JOHN GEORGE OETZEL. \Vitnesses:

JAMES T. GRAHAM. EDGAR TATE.

